getting slow

Discussion in 'General' started by m-mehdipoor, Feb 14, 2013.

  1. m-mehdipoor

    m-mehdipoor Member

    Hi,
    I have a new problem.
    I have a server with these HDD combination .
    3 X 300 GIG sas 15 RPM
    1 X 2 TB sata 2 .
    when there is a huge process in my server and the server get slow ( for example copy a heavy file ) the webserver get slow after that , and when the process finishes the webserver is slow till we restart the webserver ...
    is there any solution to solve this issue?
    I use Litespeed Web Server Enterprise v4.2.1.
    2 X E5645 processor
    32 Gig of memory.
     
  2. webizen

    webizen Well-Known Member

    run 'top -c' to see which process consumes cpu cycles the most when it is slow.
     
  3. m-mehdipoor

    m-mehdipoor Member

    here you are


    top - 23:35:54 up 14 days, 13:55, 2 users, load average: 4.14, 4.48, 5.49
    Tasks: 614 total, 4 running, 610 sleeping, 0 stopped, 0 zombie
    Cpu(s): 6.1%us, 2.2%sy, 0.0%ni, 84.9%id, 6.7%wa, 0.0%hi, 0.1%si, 0.0%st
    Mem: 32869940k total, 31205192k used, 1664748k free, 867556k buffers
    Swap: 4194296k total, 469832k used, 3724464k free, 25757684k cached

    PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    31615 mysql 20 0 12.8g 1.0g 5188 S 55.2 3.2 2050:05 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mys
    30474 moviefa 20 0 232m 36m 7884 S 31.5 0.1 0:01.82 lsphp5
    30421 funmusi1 20 0 248m 53m 7816 R 28.9 0.2 0:03.55 lsphp5:/home1/funmusi1/public_html/index.php
    30418 ariapato 20 0 337m 47m 8100 S 23.7 0.1 0:01.12 lsphp5:/home1/ariapato/public_html/index.php
    30509 sohrabs 20 0 211m 14m 7392 S 15.8 0.0 0:00.06 lsphp5
    30506 vatanpho 20 0 236m 41m 7716 S 13.1 0.1 0:00.40 lsphp5
    30464 hollywoo 20 0 307m 16m 7612 S 7.9 0.1 0:00.21 lsphp5
    25216 nobody 1 -19 234m 107m 31m D 5.3 0.3 2:12.43 litespeed (lshttpd)
    30493 root 20 0 15428 1672 940 R 5.3 0.0 0:00.08 top -c
    1391 root 20 0 0 0 0 S 2.6 0.0 19:25.57 [flush-8:0]
    1972 root 20 0 0 0 0 S 2.6 0.0 19:29.27 [kondemand/0]
    1984 root 20 0 0 0 0 S 2.6 0.0 13:29.92 [kondemand/12]
    30323 celebba1 20 0 237m 42m 7784 S 2.6 0.1 0:03.89 lsphp5
    30472 jazireh0 20 0 242m 44m 7784 S 2.6 0.1 0:00.30 lsphp5:/home1/jazireh0/public_html/index.php
    30503 dlandsh 20 0 211m 14m 7332 S 2.6 0.0 0:00.05 lsphp5
    1 root 20 0 19356 948 724 S 0.0 0.0 1:37.13 /sbin/init
    2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 [kthreadd]
    3 root RT 0 0 0 0 S 0.0 0.0 1:33.17 [migration/0]
    4 root 20 0 0 0 0 S 0.0 0.0 6:05.35 [ksoftirqd/0]
    5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/0]
    6 root RT 0 0 0 0 S 0.0 0.0 0:01.53 [watchdog/0]
    7 root RT 0 0 0 0 S 0.0 0.0 1:15.90 [migration/1]
    8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/1]
    9 root 20 0 0 0 0 S 0.0 0.0 5:40.84 [ksoftirqd/1]
    10 root RT 0 0 0 0 S 0.0 0.0 0:00.86 [watchdog/1]
    11 root RT 0 0 0 0 S 0.0 0.0 1:01.63 [migration/2]
    12 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/2]
    13 root 20 0 0 0 0 S 0.0 0.0 5:51.90 [ksoftirqd/2]
    14 root RT 0 0 0 0 S 0.0 0.0 0:00.98 [watchdog/2]
    15 root RT 0 0 0 0 S 0.0 0.0 0:51.85 [migration/3]
    16 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/3]
    17 root 20 0 0 0 0 S 0.0 0.0 5:51.91 [ksoftirqd/3]
    18 root RT 0 0 0 0 S 0.0 0.0 0:00.96 [watchdog/3]
    19 root RT 0 0 0 0 S 0.0 0.0 0:45.83 [migration/4]
    20 root RT 0 0 0 0 S 0.0 0.0 0:00.00 [migration/4]
    21 root 20 0 0 0 0 S 0.0 0.0 5:33.91 [ksoftirqd/4]
    22 root RT 0 0 0 0 S 0.0 0.0 0:00.91 [watchdog/4]
     
  4. webizen

    webizen Well-Known Member

    mysql database consumes the most resources. likely it is overloaded. hence the slow. better run db on its own disk or move db to its own server.
     
  5. m-mehdipoor

    m-mehdipoor Member

    I seprated if before on another disk sir...
     
  6. webizen

    webizen Well-Known Member

    what about static file download? are those files are separate drives from db? are they slow as well?
     
  7. m-mehdipoor

    m-mehdipoor Member

    they had problem as well
    I found the problem in IO wait time .
    it seems there are a lot of process on that sata HDD..
    but I don't know why I restart the webserver the speed will be well for some minutes...
    is it possible to do such a thing like this automaticaly ?
    I means the server do that it self and I wont have to do it manually ..
     
  8. webizen

    webizen Well-Known Member

  9. m-mehdipoor

    m-mehdipoor Member

    how should I enable it ?
     
  10. webizen

    webizen Well-Known Member

    As the URL path indicates: LSWS Web Admin Console => Configuation => Server => Tuning
     
  11. m-mehdipoor

    m-mehdipoor Member

    it is enable > Use Asynchronized disk I/O (AIO)
    Yes

    --
    should I increase AIO Block Size?
    it is on 1M now
     

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